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Problems with EGL / OpenGL ES 2.0 on Radeon Catalyst 11.9

In my first sample to check if importing the driver functions work i didn't see any problems (just rendering a triangle on default framebuffer.).
But in the engine we render the scenes into a framebuffer, which are then used as texture to blend over different scenes. Before, when using Imagination SDK this worked just fine, but with now it flickers with every second frame being black, seems to me like a problem with buffer swapping.

Now my question: Does anyone know if problems or limitations with Radeon / Catalyst exist ? Cause i didn't find any useful documentation about it.